Stop-motion for knitting-machines.



m. 760,998. PATENTED MAY 24, 1904. 4

- G. A. LANDENBERGER.

STOP MOTION FOR KNITTING MACHINES.

. APPEIOATIOH FILED D110. 22, 1903. H0 MODEL. 2 SHEETS-SHEET 1'. I

. N0 MODEL.

No. 760,998. PATENTEDMAY 24, 1904.

G. A. LANDENBERGER.

STOP MOTION FOR KNITTING MACHINES. APPLICATION PYILED DEC. 22, mos.

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UNITED STATES Patented May 24,- 1904.

PATENT OFFICE.

GUSTAV A. LANDENBERGER, OF PHILADELPHIA, PENNSYLVANIA.

STOQP-MSOTION FOR KNITTING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 760,998, dated May 24,1904.

Application filed December 22, 1903. Serial No. 186,173. No model.)

To all whom it may concern:-

Be it known that I, Gus'rAv A.'LANDEN- BERGER, a subject of the Emperorof Austria- Hungary, (having resided in the United States one year lastpast and having declared my intention to become a citizen of the UnitedStates,) residing at Philadelphia, in the county of Philadelphia andState of Pennsylvania,

have invented a new and useful Improvement in Stop-Motions forKnitting-Machines, of which the following is a specification.

My invention relates to stop motions for knitting-machines.

It consists of novel means operative in case of a tight cop, a knot inthe yarn, or a break therein for throwing oif the power from the machineand for quickly arresting its motion.

It further consists of other novel features of construction, all as willbe hereinafter fully Set forth.

Figure 1 represents an elevation of so much of a knitting-machine as isnecessary to show my invention. Fig. 2 represents a similar elevationtaken at a right angle to that shown in Fig. 1. Fig. 3 represents ahorizontal section through the line v 00, Fig. 2. Figs. 4 and 5represent fragmentary details of the stopping device.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings, 1 designates the driving-shaft of aknitting-machine having fast and loose pulleys 2 and 3. From the shaft 1are driven all the working parts of the machine shown and not showninthe drawings. 4 designates the base or stand of the machine, fromwhich rises the usual rod 5, adapted to carry the stop-motion devices.Secured on the rod 5 is a bracket 6, carrying a block 7 on which ispivoted a lever 8. At the outer end of the lever 8 is a fork 9. Thebracket 6 also carries a block 10, on which is pivotally supported abent rod 11, carrying a weight 12. On' the rod 11 arelaterally-projecting pins 13. A stop 14 limits the rearward motion ofthe rod 11. Supported on the upright 5 are bars 15, in which is guided arod 16, resiliently supported by means of a. spring 17 on a cross-bar 18at the top of the rod 5. The

rod 16 is provided with a fork 19 at its upper end. Secured to thecross-bar 18 is a tensionspring 20, having at its free end a hook 21.

Apertures 22 and 23 at the ends of the crossbar 18 are adapted toreceive the yarn 24, as clearly shown in Fig. 1. Pivoted on the upright5 are levers 25'and 26, connected by a vertical rod 27. The free end ofthe lever 25 is provided with a plate 28. (Shown in Figs. 1 and 2.) Fromthe free end. of the lever 26 depends a rod 29, resiliently supported bya light spring 30. The rod 29 is shown passing through the base 4 of themachine and has pivoted at its lower end a lever'31, the length of whichis adjustable by means of a turnbuckle 32. Supported in a bracket 33beneath the stand 4 is a rod 34, connected by a pitman 35 with the lever31. The rod 34 is forced in the direction of its free end by a spring36. As shown in Fig. 3, the end 37 of the rod 34 engages with a block 38on a shaft 39, longitudinally actuated by a spring 40 and carrying forks41, adapted to engage with a belt 42, and a brake 43, adapted to bearagainst the web of the fast pulley 2. On the shaft 1 is mounted a smallpulley 44, from which a belt runs to a wheel 46, having a plurality ofteeth 47 and supported, as shown in Fig. 1, on a leg 48 of the standard4.

The operation is as follows: The thread 24 from the cop 49 is carriedupward through a suitable guide 50, which leads it through the fork 9 onthe lever 8, thence upward through the aperture 22 in the rod 18, overthe fork 19 of the rod 16 and hook 21 of the tensionspring 20, andthence through the aperture 23 at the other end of the rod 18 to theneedles, its path being shown in Figs. 1 and 4. The thread in passingover the fork 29 to the aperture 22 bears against the pins 13 of thelever 11 and prevents the lever from falling. In case of what is knownas a tight cop that is, where the yarn 24 does not readily slip ofl thecop or bobbin 49the strain on the thread.

will be communicated through the rod 16 to the plate 28 on the lever 25.This will tend to depress the free end of the lever 25, which, actingthrough the rod 27, lever 26, and rod 30, will depress the lever 31, sothat its point will engage with one of the teeth 47 of the wheel 46. Theeffect of this will be to swing the lever 31 to the left of the drawingFig. 1, so that the dog 37 will be withdrawn from contact with the block38 on the shaft 39. The heavy thrust-spring 40' will then act topositively move the rod 39 to the right of Figs. 2 and 3, thus shiftingthe belt 42 from the fixed pulley 2to the loose pulley 3 and at the sametime applying a shoe of the brake 4:3 to the web of the pulley 2, thusboth cutting off the power from the machine and positively braking itsmotion. In the event of a knot, as 51,

-(shown in Fig. 1,) occurring in the thread 2A the same will engage withthe fork 9 on the lever 8 and through the connection of the free end ofthat lever with the plate 28 depress the plate, with the result justdescribed.

Should the thread 24 break or come to an end, the weighted lever 11being no longer supported by the contact of the thread with the pins 13will fall forward, as shown in dotted lines, Fig. 1, and strike thelever 25, so as to depress the same and, as before, cut off the powerand stop the motion of the machine.

It will be seen that my device provides eflicient means for promptlystopping the machine in case of any one of the three accidents to theyarn to which knitting-machines are subject and that all these means actthrough a single mechanism, beginning at the plate 28 and continuing tothe shifter and brake device.

It is evident that various changes may be made by those skilled in theart which will come within the scope of my invention, and I do not,therefore, desire to be limited in every instance to the exactconstruction herein shown and described.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is Y 1. A stop motion for a knitting-machinecomprising positively-actuated power-arresting means, means forreleasing the same including a continuously-rotated wheel, a leverengageable therewith and means for forcing such lever into engagementwith said wheel, and a weighted portion normally sustained by the yarnand adapted to percussive engagement with said lever-engaging means inthe event of a break or termination of the yarn.

2. A stop-motion for a knitting-machine comprising positively-actuatedpower-arresting means, means for releasing the same including acontinuously-rotated wheel, a lever engageable therewith and means forforcing such lever into engagement with said wheel,

and means for normally deflecting the yarnfrom its path, said deflectingmeans being operatively engageable with said lever-engaging means in theevent of an increased strain on the yarn.

3. A stopmotion for a knitting-machine comprising positively-actuatedpower-arresting means, means for releasing the same including acontinuously-rotated wheel, a lever engageable therewith and means forforcing said lever into engagement with said wheel, a weighted portionnormally sustained by the yarn and a movable portion normally deflectingsaid yarn from its path, both said weighted portion and said deflectingmeans being alternately engageable with said leverengaging means.

4. In a stop-motion for a knitting-machine,

positively actuated power arresting means, means for releasing sameincluding a continuously-rotated wheel, a lever engageable with saidwheel and a pivoted weighted portion adapted to be sustained by the yarnand to have percussive engagement with means for moving said lever intoengagement with said wheel in the event of a break or termination of theyarn. 5. In a stop-motionfor a knitting-machine, positively-actuatedpowerarresting means, means for releasing same including acontinuously-rotated wheel, a lever engageable with said wheel and alongitudinally-movable rod by which the yarn is carried out of itsstraight path, said rod being operatively connected with means formoving said lever into engagement with said wheel.

GUSTAV A. LANDENBERGER.

Witnesses:

JoHN A. WIEDERSHEIM, GEO. L. (100mm.

